inclement

adjectives

(of weather or climate) severe
antonym
is derived from
is derived from
see also
(of weather or climate) not mild; subject to extremes
"an intemperate climate"; "intemperate zones"
used of persons or behavior; showing no clemency or mercy
"the harsh sentence of an inclement judge"
is derived from
antonym
is similar to
not forbearing; ruthless
"an unsparing critic"
see also
having or showing no mercy
"the merciless enemy"; "a merciless critic"; "gave him a merciless beating"